Support benchmarking script by using real application trace

[nwangfw]

Pull Request Description

This PR adding benchmarking support by using real user application prompt traces in the heterogenous gpu story. This is a general benchmarking methods working for all models. It addresses the issue where the current fix benchmarking process may not be working for certain models or certain configuration settings (e.g., temperature)

Related Issues

Resolves: #722

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